Roland> Testing on PCI Express/Arbel systems (with dual 3.2 GHz
Roland> Xeons) with FW 4.5.3, I've seen somewhat different
Roland> behavior. Even after setting IPOIB_NUM_WC to 1 so that
Roland> IPoIB never polls more than 1 CQE at a time (and so we
Roland> always inc the CI by exactly 1), I still get the CQ
Roland> overrun.
FW 4.6.1 on these systems behaves the way Tavor FW 3.3.1 did on my
systems: if I modify IPoIB to always poll 1 CQE at a time, it works
fine. If IPoIB polls more than 1 CQE at a time then we see an
overrun.
- Roland
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